All orders will be sent by return of post / by return mail.所有订货会尽快送出。Please send a reply by return of post.请将回信交下班邮班寄回。The woman wrote back by return of post, offering Hannah a job.那位女性立即写了回信，给汉娜提供了一份工作。Orders will be sent by return of post.订单将立即寄出。I replied by return of post.我马上回了信。